science revision 0.0 / 5 ? Health & Social CarehnbnbBTEC NationalAQA Created by: hghghghjjkijijijijiCreated on: 16-05-14 18:56 who created the periodic table? Dmitri Mendeleev 1 of 22 how do we know a chemical reaction has taken place? change size, change colour or if it produces bubbles 2 of 22 complete the word equasion: iron + oxygen -> ................. iron oxide 3 of 22 what does a wod equasion explain? a word equasion describes a chemical reaction using words 4 of 22 for a certian area will a big force give a high or a low pressure? a big force wil give high pressure 5 of 22 which two of the following metals are magnetic: aluminium, copper, nickel, wood or iron nickel and iron 6 of 22 why does an electromagnet need a core? because it makes it a magnetic material 7 of 22 what is the earths core made of? iron 8 of 22 how is the Earth's magnetic field produced? by an electric currernt in the core 9 of 22 what is a cosmic ray? high energy paricles 10 of 22 how can cosmic rays affect your health? because of the strong force 11 of 22 what is the needle of a compass made of? magnetic materials 12 of 22 where is bacteria found? in air, soil, water, plants ad animals 13 of 22 what does engolfing mean? when bacteria is eaten and then bascteria changes the white blood cells into puss 14 of 22 what does the heart pump blood around? Vains and Arteries 15 of 22 give a definition of a temperature a temperature measures how hot or cold something is 16 of 22 what object do we use to measure temperature? a thermometer 17 of 22 how fast do particles in a solid move? particles in a solid dont move 18 of 22 what is convection? convection is when something floats because there are less dense particles than the air 19 of 22 what happens to the density of water as you heat it? the density is less dense when heated because the particles are expanding 20 of 22 how does a heater use convection? it pumps out walm air by heating cold air particles in the room 21 of 22 how does sweating cool us down? by removing heat from our body to the envirolment 22 of 22
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